You could indicate some site to obtain data of all the goals of a season by championship and by clubs in some site of statistics or of some service paid.
I know SoccerWay, Soccerstats among others, but I would like someone to report the number of goals of the season and the clubs.
I would like to know which championships have the least goals.
I dont know if your wishes are fullfiled to the maximum, but soccervista.com keeps many interesting stats not listed on websites like soccerway.com. I use those two together.